What is respiration?

a.
the body's way of dispelling waste.
b.
the body's process of getting & using oxygen.
c.
the body's method of circulating blood.
d.
the body's response to stimuli.

What are chlorofluorocarbons and what impact do they have on the atmosphere?

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

However, had it been a real sound, the sound's pitch would have been increased by the doppler effect, since the falcon was moving the source of the sound. perpendicular to away from towards at the same speed as